Comparative analysis of a hybrid propulsion using LNG-LH2 complying with regulations on emissions

Jeong, Jinyeong; Seo, Suwon; You, Hwalong; Chang, Daejun

doi:10.1016/j.ijhydene.2018.01.041

Cited by 26 publications

(15 citation statements)

References 27 publications

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“…Although the efficiency of steam power plant is lower than internal combustion engines, UST with reheating has improved the efficiency of the steam cycle to a comparative level. Typical efficiencies of 157,000 m 3 LNG carrier using ST, UST, SSDE with reliquefaction plant, dual fuel MSDE, and COGAS power plants are 35%, 41%, 40%, 42%, and 50%, respectively [2,29,66]. UST emission factors are reduced by 25% compared with the simple GT cycle [14].…”

Section: Environmental Resultsmentioning

confidence: 99%

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Environmental and Cost-Effectiveness Comparison of Dual Fuel Propulsion Options for Emissions Reduction Onboard LNG Carriers

Ammar¹

2019

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The selection of the suitable propulsion system for LNG carrier highly affects the ship capital and life cycle costs. The current paper compares between the available propulsion systems for LNG carriers from environmental and economic points of view operated with heavy fuel oil (HFO) and marine gas oil (MGO). In addition, the cost-effectiveness for emission reduction due to using dual fuel propulsion options using natural gas fuel (NG) is calculated. As a case study, large conventional LNG carrier class has been investigated. The results show that steam turbine (ST), Ultra-ST, dual fuel diesel engine (DFDE), and combined gas and steam (COGAS) propulsion options can comply with NOx and SOx emissions regulations set by IMO using dual fuel mode with NG percentages of 87.5%, 82%, 98.5% and 94%, respectively. DFDE operated with pilot HFO and NG is the most economic propulsion option.

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Section: Environmental Resultsmentioning

confidence: 99%

“…Environmental and cost-effectiveness comparison of dual fuel propulsion options for emissions reduction onboard LNG carriers66 …”

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confidence: 99%

Environmental and Cost-Effectiveness Comparison of Dual Fuel Propulsion Options for Emissions Reduction Onboard LNG Carriers

Ammar¹

2019

brod

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“…A PEMFC-battery hybrid propulsion system was developed for a tourist boat [26], the reliable operation of which was successfully demonstrated in the coastal waters of South Korea. A hybrid propulsion system coupling an LNG-fueled combustion engine with a hydrogen-fueled PEMFC was proposed for an LNG carrier [27]. To satisfy the required energy efficiency design index, the energy fractions from hydrogen were determined.…”

Section: Introductionmentioning

confidence: 99%

Fuel Cell Power Systems for Maritime Applications: Progress and Perspectives

et al. 2021

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Fuel cells as clean power sources are very attractive for the maritime sector, which is committed to sustainability and reducing greenhouse gas and atmospheric pollutant emissions from ships. This paper presents a technological review on fuel cell power systems for maritime applications from the past two decades. The available fuels including hydrogen, ammonia, renewable methane and methanol for fuel cells under the context of sustainable maritime transportation and their pre-processing technologies are analyzed. Proton exchange membrane, molten carbonate and solid oxide fuel cells are found to be the most promising options for maritime applications, once energy efficiency, power capacity and sensitivity to fuel impurities are considered. The types, layouts and characteristics of fuel cell modules are summarized based on the existing applications in particular industrial or residential sectors. The various research and demonstration projects of fuel cell power systems in the maritime industry are reviewed and the challenges with regard to power capacity, safety, reliability, durability, operability and costs are analyzed. Currently, power capacity, costs and lifetime of the fuel cell stack are the primary barriers. Coupling with batteries, modularization, mass production and optimized operating and control strategies are all important pathways to improve the performance of fuel cell power systems.

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“…Choi et al [15] developed a PEMFC-battery hybrid propulsion system for a tourist boat, and demonstrated the reliable operation in the coastal waters of South Korea. Jeong et al [16] analyzed a hybrid propulsion system consisting of a LNG-fueled combustion engine and a hydrogen-fueled PEMFC. Based on this background, it is possible to affirm that there is a great interest in developing hydrogen-based powertrain on-board ships, even if several issues, from technical and economic points of view, have to be furtherly and deeply analyzed.…”

Section: Introductionmentioning

confidence: 99%

Feasibility analysis of an innovative naval on-board power-train system with hydrogen- based PEMFC technology

et al. 2021

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The maritime transportation sector is one of the main contributors to global emissions of greenhouse gases (GHGs), volatile organic compounds (VOCs), particulate matter (PM), hazardous air pollutants, NOX and SOX. In particular, it is estimated that the CO2 emissions in this sector are about 1 Gt every year. The International Maritime Organization (IMO) adopted stringent emission limits in its Tier III regulation, most notably on NOX and SOX emissions and pledged to reach a reduction in greenhouse gas (GHG) emissions from international shipments by at least 50% by the year 2050, compared to 2008 emissions. For emission control areas (ECAs) these requirements are particularly strict and will be difficult to meet with traditional diesel engines and bunker fuels. Therefore, ship owners need to adopt solutions to bring emissions within these and other future limits by means of environmentally friendly fuels and high efficiency propulsion technologies. In this context, hydrogen and fuel cells play a crucial role, thanks to their low criteria pollutant and GHG emission. This paper presents a techno-economic feasibility study for replacing the conventional diesel engine powertrain, usually employed in Ro-Pax ferries, with an innovative system based on polymer electrolyte membrane fuel cell (PEMFC) technology. The ferry is actually powered by four diesel engines, which deliver a total output of 37.8 MW. The ferry also has two auxiliary engines which give an output of 4.0 MW and also two 2.0 MW bow thrusters for its manoeuvring. The energy analysis has allowed to define the hydrogen consumption for each cruise, as well as the optimal size of the innovative propulsion system. In particular, The PEMFC powertrain is sized at the same maximum power output as the main diesel engine and, thanks to the modular architecture of fuel cells and their flexible performance at partial load, the auxiliary engines are not contemplated. Moreover, in order to identify the best solution in terms of ship’s weight and space requirements, two hydrogen storage solutions based on compressed hydrogen technology and liquefied hydrogen technology, have been analyzed and compared. The economic assessment has been carried out by estimating the CAPEX and OPEX for each H2 storage technology by considering short-term, mid-term and long-term scenarios (from 2020 to 2050).

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Comparative analysis of a hybrid propulsion using LNG-LH2 complying with regulations on emissions

Cited by 26 publications

References 27 publications

Environmental and Cost-Effectiveness Comparison of Dual Fuel Propulsion Options for Emissions Reduction Onboard LNG Carriers

Environmental and Cost-Effectiveness Comparison of Dual Fuel Propulsion Options for Emissions Reduction Onboard LNG Carriers

Fuel Cell Power Systems for Maritime Applications: Progress and Perspectives

Feasibility analysis of an innovative naval on-board power-train system with hydrogen- based PEMFC technology

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